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This happens when a main sequence star uses up all of its fuel and swells. Next stage: Red Giant.
The Main Sequence stage.
The star will move on to its next stage of evolution, along the Red Giant branch.
Our sun is a main sequence (dwarf) star. It's expected to remain so for the next 5 billion years or so. After that it will expand briefly into a red giant, then collapse into a white dwarf.
Theoretically, in 5 billion years, the Sun will still be in the main sequence. 5.4 billion years (estimated) marks the end of main sequence, where it will be in the intermediary point between a main-sequence star and a post-main-sequence red giant, where it will slowly reach over 200 times it's current mass over the course of about a billion more years, at which point it would be classified as an official red giant and be fully burning helium-4 as a main source of fuel as well as burning a hydrogen shell it built up during the main-sequence. After that point it will eject most of its mass into a planetary nebula and slowly cool as a stellar remnant over the course of a few quadrillion years until it reaches 3K.
This happens when a main sequence star uses up all of its fuel and swells. Next stage: Red Giant.
The Main Sequence stage.
white dwarf. unless you count black dwarf of which none have been observed, only theorized.
The star will move on to its next stage of evolution, along the Red Giant branch.
Our sun is a main sequence (dwarf) star. It's expected to remain so for the next 5 billion years or so. After that it will expand briefly into a red giant, then collapse into a white dwarf.
it is fusion of hydrogen into helium. (like our sun) if it is a red giant (the next stage of our suns life) it is burning helium into denser things.
The word "next" tells the reader that this is not the main idea, because it is next in the sequence of the paragraph. There is a sentence before it that would be the main idea.
It will become a red giant.
A protostar is the first building block of the main star. As it has not yet accumulated enough mass to join the main sequence, it will be smaller than the main star. The next stage will be a T Tauri star.
The next letter in the sequence AAAAA is 'E'. It is a vowel sequence.
What is the the next number in the sequence 1,2,4,7,11,.....
Theoretically, in 5 billion years, the Sun will still be in the main sequence. 5.4 billion years (estimated) marks the end of main sequence, where it will be in the intermediary point between a main-sequence star and a post-main-sequence red giant, where it will slowly reach over 200 times it's current mass over the course of about a billion more years, at which point it would be classified as an official red giant and be fully burning helium-4 as a main source of fuel as well as burning a hydrogen shell it built up during the main-sequence. After that point it will eject most of its mass into a planetary nebula and slowly cool as a stellar remnant over the course of a few quadrillion years until it reaches 3K.